Browse ORBi by ORBi project

- Background
- Content
- Benefits and challenges
- Legal aspects
- Functions and services
- Team
- Help and tutorials

Magnetic Model Refinement via a Coupling of Finite Element Subproblems Dular, Patrick ; ; et al in Scientific Computing in Electrical Engineering (2012) Model refinements of magnetic circuits are performed via a subdomain finite element method. A complete problem is split into subproblems with overlap- ping meshes, to allow a progression from source to ... [more ▼] Model refinements of magnetic circuits are performed via a subdomain finite element method. A complete problem is split into subproblems with overlap- ping meshes, to allow a progression from source to reaction fields, ideal to real flux tubes, 1-D to 3-D models, perfect to real materials, statics to dynamics, with any coupling of these changes. Its solution is then the sum of the subproblem solutions. The procedure simplifies both meshing and solving processes, and quantifies the gain given by each refinement on both local fields and global quantities. [less ▲] Detailed reference viewed: 11 (0 ULg)Quality open source mesh generation for cardiovascular flow simulations ; ; Geuzaine, Christophe et al in Ambrosi, D.; Quarteroni, A.; Rozza, G. (Eds.) Modelling Physiological Flow (2012) Detailed reference viewed: 103 (3 ULg)Computation of induced fields into the human body by dual Finite Element formulations ; Vazquez Sabariego, Ruth ; et al in IEEE Transactions on Magnetics (2012), 48(2), 783-786 Detailed reference viewed: 24 (5 ULg)Stochastic uncertainty quantification of eddy currents in the human body by polynomial chaos decomposition ; ; Vazquez Sabariego, Ruth et al in IEEE Transactions on Magnetics (2012), 48(2), 451-454 Detailed reference viewed: 21 (11 ULg)Discontinuous Galerkin Method for Computing Induced Fields in Superconducting Materials ; ; et al in IEEE Transactions on Magnetics (2012), 48(2), 591-594 Detailed reference viewed: 71 (10 ULg)Electro-Mechano-Fluidic Modelling of Microsystems using Finite Elements ; ; et al in IEEE Transactions on Magnetics (2012), 48(2), 355-358 Detailed reference viewed: 19 (3 ULg)Finite Element Computational Homogenization of Nonlinear Multiscale Materials in Magnetostatics Niyonzima, Innocent ; V Sabariego, Ruth ; Dular, Patrick et al in IEEE Transactions on Magnetics (2012), 48(2), 587-590 The increasing use of composite materials in the technological industry (automotive, aerospace, ...) requires the development of effective models that account for the complexity of the microstructure of ... [more ▼] The increasing use of composite materials in the technological industry (automotive, aerospace, ...) requires the development of effective models that account for the complexity of the microstructure of these materials and the nonlinear behaviour they can exhibit. In this paper we develop a multiscale computational homogenization method for modelling nonlinear multiscale materials in magnetostatics based on the finite element method. The method solves the macroscale problem by getting data from certain microscale problems around some points of interest. The missing nonlinear constitutive law at the macroscale level is derived through an upscaling from the microscale solutions. The downscaling step consists in imposing a source term and determining proper boundary conditions for microscale problems from the macroscale solution. For a two-dimensional geometry, results are validated by comparison with those obtained with a classical brute force finite element approach and a classical homogenization technique. The method provides a good overall macroscale response and more accurate local data around points of interest. [less ▲] Detailed reference viewed: 135 (31 ULg)A Primal/Dual Approach for the Accurate Evaluation of the Electromechanical Coupling in MEMS ; Geuzaine, Christophe in Finite Elements in Analysis & Design (2012), 49(1), 19-27 Detailed reference viewed: 20 (10 ULg)A Quasi-Optimal Non-Overlapping Domain Decomposition Algorithm for the Helmholtz Equation ; ; Geuzaine, Christophe in Journal of Computational Physics (2012), 231(2), 262-280 Detailed reference viewed: 28 (6 ULg)Efficient Evaluation of the Geometrical Validity of Curvilinear Finite Elements Johnen, Amaury ; ; Geuzaine, Christophe Conference (2011, November 14) Detailed reference viewed: 45 (16 ULg)Vectorial Incremental Nonconservative Consistent Hysteresis model François-Lavet, Vincent ; ; Stainier, Laurent et al in Hogge, Michel; Van Keer, Roger; Malengier, Benny (Eds.) et al Proceedings of the 5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011) (2011, November) This paper proposes a macroscopic model for ferromagnetic hysteresis that is well-suited for finite element implementation. The model is readily vectorial and relies on a consistent thermodynamic ... [more ▼] This paper proposes a macroscopic model for ferromagnetic hysteresis that is well-suited for finite element implementation. The model is readily vectorial and relies on a consistent thermodynamic formulation. In particular, the stored magnetic energy and the dissipated energy are known at all times, and not solely after the completion of closed hysteresis loops as is usually the case. The obtained incremental formulation is variationally consistent, i.e., all internal variables follow from the minimization of a thermodynamic potential. [less ▲] Detailed reference viewed: 97 (14 ULg)Partial Differential Equations and Meshing Geuzaine, Christophe Scientific conference (2011, November) Detailed reference viewed: 27 (2 ULg)Proceedings of the 5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011) Hogge, Michel ; ; et al Book published by Université de Liège - Dépôt légal: D/2011/0480/31 (2011) Detailed reference viewed: 46 (7 ULg)Mesh influence on cardiovascular simulations ; ; et al in Proceedings of the 5th international conference on Advanced COmputational Methods in ENgineering (ACOMEN 2011) (2011, November) Detailed reference viewed: 14 (1 ULg)Discontinuous Galerkin method for computing vectorials fields in superconductors ; ; et al in Proceedings of the 5th international conference on Advanced COmputational Methods in ENgineering (ACOMEN 2011) (2011, November) Detailed reference viewed: 16 (0 ULg)Imposing periodic boundary condition on arbitrary meshes by polynomial interpolation Nguyen, Van Dung ; Béchet, Eric ; Geuzaine, Christophe et al in Hogge, Michel; Van Keer, Roger; Dick, Erik (Eds.) et al Proceedings of the 5th International Conference on Advanded COmputational Methods in Engineering (ACOMEN2011) (2011, November) In order to predict the effective properties of heterogeneous materials using the finite element approach, a boundary value problem (BVP) may be defined on a representative volume element (RVE) with ... [more ▼] In order to predict the effective properties of heterogeneous materials using the finite element approach, a boundary value problem (BVP) may be defined on a representative volume element (RVE) with appropriate boundary conditions, among which periodic boundary condition is the most efficient in terms of convergence rate. The classical method to impose the periodic boundary condition requires identical meshes on opposite RVE boundaries. This condition is not always easy to satisfy for arbitrary meshes. This work develops a new method based on polynomial interpolation that avoids the need of the identical mesh condition on opposite RVE boundaries. [less ▲] Detailed reference viewed: 129 (62 ULg)Robust generation of curvilinear hybrid meshes for CFD ; ; et al in Proceedings of the 5th international conference on Advanced COmputational Methods in ENgineering (ACOMEN 2011) (2011, November) Detailed reference viewed: 17 (0 ULg)Finite Element Computational Homogenization for Heterogeneous Materials in Magnetodynamics Niyonzima, Innocent ; Vazquez Sabariego, Ruth ; Dular, Patrick et al in Proceedings of the Fifth International Conference on Advanced COmputational Methods in ENgineering (ACOMEN 2011) (2011, November) Detailed reference viewed: 41 (10 ULg)Geometrical validity of curvilinear finite elements Johnen, Amaury ; ; Geuzaine, Christophe in William Roshan, Quadros (Ed.) Proceedings of the 20th International Meshing Roundtable (2011, October 25) In this paper, we describe a way to compute accurate bounds on Jacobians of curvilinear finite elements of all kinds. Our condition enables to guarantee that an element is geometrically valid, i.e., that ... [more ▼] In this paper, we describe a way to compute accurate bounds on Jacobians of curvilinear finite elements of all kinds. Our condition enables to guarantee that an element is geometrically valid, i.e., that its Jacobian is strictly positive everywhere in its reference domain. It also provides an efficient way to measure the distortion of curvilinear elements. The key feature of the method is to expand the Jacobian using a polynomial basis, built using Bézier functions, that has both properties of boundedness and positivity. Numerical results show the sharpness of our estimates. [less ▲] Detailed reference viewed: 34 (11 ULg)Conditions aux limites de transmission robustes en decomposition de domaines pour l'acoustique ; ; Geuzaine, Christophe Scientific conference (2011, October 24) Detailed reference viewed: 9 (1 ULg) |
||